package interface_d4;
//实现类 实现接口，可以多个
public  class D implements A,B,C {

    @Override
    public void test() {

    }

    @Override
    public void testb1() {

    }

    @Override
    public void testb2() {

    }

    @Override
    public void testc1() {

    }

    @Override
    public void testc2() {

    }
}
